Improved bed-bottom



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MPETERS. PHOTO-LITHQGRAPNER. WASHINGTON. D cA waited tatee aient (titille Letters Patent No. 99,056, dated January 25, 1870.

IMPROVE!) BED-BOTTOM.

The Schedule referred to in these Letters Patent and making part of the same.

Be it known that I, WARREN R. BRIGGS, of Boston, in the county of Suiolk, and State of Massachusetts, have made an invention of a new and useful Spring or Elastic Bed-Bottom; and do hereby declare the following description to embrace the chief points of novelty in such invention, due reference being had to the accompanying drawings, in which- Figure 1 is a perspective representation of one mode of carrying out my invention.

Figure 2 -represents a modification of my invention.

The invention herein described is intended to secure, in a spring-bed foundation, simplicity,` low cost, and durability, these results being attained by means of the device which I have invented.

This invention consists in the adoption of a coiled spring, of peculiar general lcurvature or form, such springr being combined with a slatted frame or frames, or a frame and a sacking or woven covering, in mannersirnilar to the general disposition of such parts in other bed-bottoms.

In the drawings accompanying this specification, and

which illustrate my invention- A denotes a rectangular barred frame, of a form and size which shall adapt itself to an ordinarygbedstead.

Upon this frame, at suitable intervals, and in any given-order, I dispose a plurality of springs, a a, 85e., these springs, as exhibited in the drawings, being coiled springs, of suitable metallic wire, bent into an arch, the feet or chord of such arch terminating at, or resting upon the frame A, and each, Afor security, being made to encircle a'sholt post or stud, b, erected upon such frame, or attached thereto in any suitable manner.

Upon the aggregate upper surface or crowns of these arched springs, I dispose `and secure, in a suitable manner, a second series of slats, c c,.&c., which tend to support the bedding; or a series of rubbercovered wires, or a sacking or other device, may be substituted for the last-mentioned slats.

A portion of the arched springs should be disposed witlrtheir longest plane at right angles to that of their fellows, in order to guard against too extended swaying of the slats, or other device which they suport. p As an additional means of security in this lastmentioued respect, I interlace or unite the centres of two springs, in such manner that they shall remaiulat right angles to each other, this disposition of two springs being shown in fig. 2 of the accompanying drawings. .I

A spring,=or series of springs, under the form and arrangement substantially as before explained, contain all the requisites, so far as present experience determines necessary, in the production of a spring-bcd bottom, a characteristic and prominent advantage which attaches itself to this invention being its extreme low cost, and ease and rapidity of application or removal, whether for the purpose of cleansing thc parts, or otherwise. v

C lai-ms.

l. A spring for spring-bed bottoms, composedfof .a coiled spring, disposed in the form of an arch or au arc of a circle, with the chords of such'arch or arc resti-ng upon 'and suitably confined to the frame or support upon which the springs rest, for the purpose explained.

2. Combining or uniting two springs of the form above explained, in such manner that their longest planes shall stand at right angles to each other, the same possessing advantages before set forth.

NVARREN R. BRIGGS.

Witnesses FRED. CURTIS, EDWARD GRIFFITH. 

